Patents by Inventor Joseph Stojkov

Joseph Stojkov has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Forming near-net shape single-piece piston blanks
    Patent number: 11661903
    Abstract: A one-piece piston blank of near-net shape wherein the piston blank has a flange disposed opposite a skirt, the flange being spin-bendable to form a cooling channel with reduced preliminary removal of material relative to conventional forged piston blanks.
    Type: Grant
    Filed: February 21, 2022
    Date of Patent: May 30, 2023
    Assignee: KS KOLBENSCHMIDT US, INC.
    Inventors: David J. Boye, Bryan Quinn, Joseph Stojkov, Joshua Cota, Scott D. Bailey
  • Near-Net Shape Single-Piece Piston Blanks
    Publication number: 20220178328
    Abstract: A one-piece piston blank of near-net shape wherein the piston blank has a flange disposed opposite a skirt, the flange being spin-bendable to form a cooling channel with reduced preliminary removal of material relative to conventional forged piston blanks.
    Type: Application
    Filed: February 21, 2022
    Publication date: June 9, 2022
    Applicant: KS KOLBENSCHMIDT US, INC.
    Inventors: David J. Boye, Bryan Quinn, Joseph Stojkov, Joshua Cota, Scott D. Bailey
  • Methods for forging a piston blank
    Patent number: 11286877
    Abstract: Methods for forging a piston blank are disclosed such that the forged piston blank is in a near-net shape and size of a final piston. Bending a flange to form a cooling channel can be done with reduced or no preliminary machining away of core material relative prior to bending the flange.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: March 29, 2022
    Assignee: KS KOLBENSCHMIDT US, INC.
    Inventors: David J. Boye, Bryan Quinn, Joseph Stojkov, Joshua Cota, Scott D. Bailey
  • METHODS FOR FORGING A PISTON BLANK AND RESULTANT NEAR-NET SHAPE SINGLE-PIECE PISTON BLANKS
    Publication number: 20190178204
    Abstract: Methods for forging a piston blank are disclosed such that the forged piston blank is in a near-net shape and size of a final piston. Bending a flange to form a cooling channel can be done with reduced or no preliminary machining away of core material relative prior to bending the flange.
    Type: Application
    Filed: February 19, 2019
    Publication date: June 13, 2019
    Applicant: KS KOLBENSCHMIDT US, INC.
    Inventors: David J. Boye, Bryan Quinn, Joseph Stojkov, Joshua Cota, Scott D. Bailey
  • Methods for forging a piston blank
    Patent number: 10253722
    Abstract: Methods for forging a piston blank are disclosed such that the forged piston blank is in a near-net shape and size of a final piston. Bending a flange to form a cooling channel can be done with reduced or no preliminary machining away of core material relative prior to bending the flange.
    Type: Grant
    Filed: March 8, 2016
    Date of Patent: April 9, 2019
    Assignee: KS Kolbenschmidt US, Inc.
    Inventors: David J. Boye, Bryan Quinn, Joseph Stojkov, Joshua Cota, Scott D. Bailey
  • Two piece hydraulic piston assembly with swaged piston-sleeve joint
    Patent number: 5014599
    Abstract: A piston and piston support rod assembly in which the piston is formed as a sheet metal stamping. A central sleeve is attached to the end wall of the stamped piston by a swaging operation performed on an annular section of the end wall. An undercut area of the sleeve defines a mandrel surface that effectively grips the end wall material deformed by the coining operation. A principal advantage of the new structure is a relatively low manufacturing cost.
    Type: Grant
    Filed: February 26, 1990
    Date of Patent: May 14, 1991
    Assignee: Federal-Mogul Corporation
    Inventors: Judith Kocsis, Joseph A. Stojkov, Michael E. Towler